@keyframes onHoverButtonAnimation {
  0% {
    width: 0%;
    left: 50%;
  }
  25% {
    width: 25%;
    left: 38%;
  }
  100% {
    left: 0%;
    width: 100%;
  }
}
.bg-overly {
  position: absolute;
  left: 50%;
  top: 0;
  width: 0%;
  height: 100px;
  background-color: #231815;
  z-index: -1;
}
.elementor-button:hover .bg-overly {
  animation-name: onHoverButtonAnimation;
  animation-duration:0.2s;  
  animation-iteration-count: 1;
  animation-fill-mode: forwards;
}
.elementor-button {
  position: relative;
  overflow: hidden;
  background-color: transparent;
  height: 50px;
  width: 300px;
  font-size: 20px;
  cursor: pointer;
  border: 1px solid #000000;
  margin: 10px;
}
.elementor-button:hover {
  color: white;
}
.green {
  color: green;
  border: 1px solid green;
}
.blue {
  color: blue;
  border: 1px solid blue;
}
.red {
  color: red;
  border: 1px solid red;
}
.orange {
  color: orange;
  border: 1px solid orange;
}
.green .bg-overly {
  background-color: green;
}
.blue .bg-overly {
  background-color: blue;
}
.red .bg-overly {
  background-color: red;
}
.orange .bg-overly {
  background-color: orange;
}

$(function () {
  $(".elementor-button").append('<div class="bg-overly"></div>');
});